This assumes your shell of choice is Bash.

Paste the following to a Terminal prompt:

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/exalted/dotfiles/main/install)"

Whenever you feel like, run a simple command to keep your environment up-to-date:

dotfiles

0. Create a script file anywhere (also in a nested directory) inside software/ (e.g., software/example.rb). (Not necessarily in Ruby, but encouraged. Shell/Python/JavaScript are also welcome.)
1. Make sure it's executable (chmod +x software/example.rb).
2. Make sure it has correct shebang (e.g., #!/usr/bin/env ruby for Ruby, #!/usr/bin/env bash for Bash, etc.).
3. Make sure they're self executable, meaning they work even if you run them directly like software/example.rb rather than through bin/dotfiles.
4. Try to write your script as less order dependent as possible related to order software.